diff --git a/examples/cluster.c b/examples/cluster.c
index db82552..9d7c224 100644
--- a/examples/cluster.c
+++ b/examples/cluster.c
@@ -161,12 +161,9 @@ static void draw_mfd(cairo_t *cr,
 static void draw_gauge_cluster_bg(hexagram_window *window,
                                   double width,
                                   double height) {
-    cairo_surface_t *sfc;
     cairo_t *cr;
 
-    sfc = window->surface_bg;
-
-    cr = cairo_create(sfc);
+    cr = hexagram_window_create_bg_context(window);
 
     /*
      * Paint canvas black